tools/qa/cppunit/test_fract.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/types.h>
  21 #include <cppunit/TestFixture.h>
  22 #include <cppunit/extensions/HelperMacros.h>
  23 #include <cppunit/plugin/TestPlugIn.h>
  24
  25 #include <rtl/math.hxx>
  26 #include <tools/fract.hxx>
  27
  28 namespace tools
  29 {
  30
  31 class FractionTest : public CppUnit::TestFixture
  32 {
  33 public:
  34
  35     void testFraction()
  36     {
  37         const Fraction aFract(1082130431,1073741824);
  38         CPPUNIT_ASSERT_MESSAGE( "Fraction #1 not approximately equal to 1.007812499068677",
  39                                 rtl::math::approxEqual((double)aFract,1.007812499068677) );
  40
  41         Fraction aFract2( aFract );
  42         aFract2.ReduceInaccurate(8);
  43         CPPUNIT_ASSERT_MESSAGE( "Fraction #2 not 1",
  44                                 aFract2.GetNumerator() == 1 &&
  45                                 aFract2.GetDenominator() == 1 );
  46
  47         Fraction aFract3( 0x7AAAAAAA, 0x35555555 );
  48         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 cancellation wrong",
  49                                 aFract3.GetNumerator() == 0x7AAAAAAA &&
  50                                 aFract3.GetDenominator() == 0x35555555 );
  51         aFract3.ReduceInaccurate(30);
  52         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 ReduceInaccurate errorneously cut precision",
  53                                 aFract3.GetNumerator() == 0x7AAAAAAA &&
  54                                 aFract3.GetDenominator() == 0x35555555 );
  55
  56         aFract3.ReduceInaccurate(29);
  57         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 29 bits failed",
  58                                 aFract3.GetNumerator() == 0x3D555555 &&
  59                                 aFract3.GetDenominator() == 0x1AAAAAAA );
  60
  61         aFract3.ReduceInaccurate(9);
  62         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 9 bits failed",
  63                                 aFract3.GetNumerator() == 0x0147 &&
  64                                 aFract3.GetDenominator() == 0x008E );
  65
  66         aFract3.ReduceInaccurate(1);
  67         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 1 bit failed",
  68                                 aFract3.GetNumerator() == 2 &&
  69                                 aFract3.GetDenominator() == 1 );
  70
  71         aFract3.ReduceInaccurate(0);
  72         CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 0 bits failed",
  73                                 aFract3.GetNumerator() == 2 &&
  74                                 aFract3.GetDenominator() == 1 );
  75
  76 #if SAL_TYPES_SIZEOFLONG == 8
  77         Fraction aFract4(0x7AAAAAAAAAAAAAAA, 0x3555555555555555);
  78         CPPUNIT_ASSERT_MESSAGE( "Fraction #4 cancellation wrong",
  79                                 aFract4.GetNumerator() == 0x7AAAAAAAAAAAAAAA &&
  80                                 aFract4.GetDenominator() == 0x3555555555555555 );
  81         aFract4.ReduceInaccurate(62);
  82         CPPUNIT_ASSERT_MESSAGE( "Fraction #4 ReduceInaccurate errorneously cut precision",
  83                                 aFract4.GetNumerator() == 0x7AAAAAAAAAAAAAAA &&
  84                                 aFract4.GetDenominator() == 0x3555555555555555 );
  85
  86         aFract4.ReduceInaccurate(61);
  87         CPPUNIT_ASSERT_MESSAGE( "Fraction #4 ReduceInaccurate reduce to 61 bit failed",
  88                                 aFract4.GetNumerator() == 0x3D55555555555555 &&
  89                                 aFract4.GetDenominator() == 0x1AAAAAAAAAAAAAAA );
  90 #endif
  91     }
  92
  93     void testMinLongDouble() {
  94         Fraction f(double(SAL_MIN_INT32));
  95         CPPUNIT_ASSERT_EQUAL(long(SAL_MIN_INT32), f.GetNumerator());
  96         CPPUNIT_ASSERT_EQUAL(1L, f.GetDenominator());
  97     }
  98
  99     void testCreateFromDoubleIn32BitsPlatform() {
 100         // This pass in 64 bits but fail in 32 bits
 101         Fraction f(0.960945);
 102         CPPUNIT_ASSERT_EQUAL(true, f.IsValid());
 103     }
 104
 105     CPPUNIT_TEST_SUITE(FractionTest);
 106     CPPUNIT_TEST(testFraction);
 107     CPPUNIT_TEST(testMinLongDouble);
 108     CPPUNIT_TEST(testCreateFromDoubleIn32BitsPlatform);
 109     CPPUNIT_TEST_SUITE_END();
 110 };
 111
 112
 113 CPPUNIT_TEST_SUITE_REGISTRATION(FractionTest);
 114 } // namespace tools
 115
 116 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */